不同来源α-Al_2O_3微粉对铝矾土质低水泥浇注料性能影响

Effects of different sources of α-Al_2O_3 powder additives on bauxite of low cement castables

探讨了将市售4种不同来源α-Al2O3微粉分别引入到铝矾土质低水泥浇注料中,4种α-Al2O3微粉分别命名为国产A、国产B、进口A、进口B。实验结果表明,进口A铝微粉由于具有双峰分布,且颗粒较细,因而其填充性较好,同时有助于体系内烧结;含有进口A铝微粉试样各项性能最好;国产B铝微粉由于粒度分布较宽,且颗粒较大,含有这种铝微粉的试样各项性能最差;国产A铝微粉颗粒分布也较窄,各项性能指标仅次于含有进口A铝微粉。

In this paper, four different were marked as domestic A, domestic B quality bauxite. The experimental results tion and fine particles, so it fills better import A powder has the best performanc commercially available sources of α-Al2O3 powder which ,import A, import B, were added into low cement castables showed that, α-Al2O3 powder of import A has bimodal distribu- and helps e ; the samp the system sintered well; the sample containing le containing domestic bution of particle size and larger particles, so it has the wors domestic A powder has narrow distribution of particle size, and i importing A powder. B powder has wider distri- t performance ts performance sample containing index is second only to